Jonathan Morgan Heit

John Herschel (voice)

Cubby

Tarzan Kid (voice)

Pete

Arthur Milligan

Zach

Kip Supernova (voice)

Mikey Davis

Cubby

Cubby

Cubby (voice)

Jimmy

Oliver Foster

Tough Franklin

Mud Bud (singing voice) (uncredited)

Patrick

Frankie Waters

Boy #1

Hans Junior (voice)

Billy Cooper

Amusement Park Ride Operator (voice)

Grandchild #2, Great Grandchild (voice)

(voice)

Boy (voice)

Little Boy (voice)

Billy (voice)

Kid #1 (voice)

Jessie